Automatic air-valve



E. a. CASE.

- AUTOMATIC AIR VALVE.

APPLICATION FILED AUG-19. 1919.

1;399p04, Patented Dec. 6, 1921.

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EDWARDR. CASE, OF ONEIDA, NEW YORK.

AUTOMATIC AIR-VALVE.

Application filed August 19, 1919.

To all whom it may concern:

Be it known that I, EDWARD R. CAsn, of Oneida, in the county of Madison in the State of New York, have invented new and useful Improvements in Automatic Air- Valves, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates tocertain new and useful improvements in automatic air valves for controlling the supply of air to the carbureter of an internal combustion engine and is particularly designed for use in connection with carbureters employed in connection with internal combustion engines of automobiles and other vehicles.

The object of the invention is to produce a device readily assembled in connection with the usual air intake pipe and which will automatically control the supply of air to the carbureter so as to produce the most effective mixture under all operating conditions. The invention takes form in a gravity actuated valve so arranged and supported as to swing freely in both (11- rections about its axis of movement to permit the passage of air under pressure in either direction. The valve normally assumes a vertical position under the influence of gravity without regard to the inclination of the car or the inclosing air pipe so that different degrees of vacuum or pressure are required to open the same under different inclinations of the supporting vehicle so that a most efficient mixture is automatically produced for driving up hill, down hill or on the level.

Other objects and advantages relate to the details of construction and operation of the device as will more fully appear from the following description taken in connection With the accompanying drawings in which:

Figure 1 is a vertical sectional view of the device assembled with the usual air inlet p f ig. 2 is a cross section of the device on line 2-2, Fig. 1.

As shown the device comprises a tube or cylinder -1 having a flange -2 formed at one end constituting a limiting stop when the cylinder is assembled with the air intake pipe -3, within which it is adapted to fit. Within the cylinder 1- is a substantially circular valve -lrotatably supported by the tube to swing about a sub Specification of Letters Patent.

the same.-

Patented Dec. 6, 1921.

Serial No. 318,567; r

The valve may be supported from suit- I able studs -5 secured to the valve and rotatably mounted in openings in the cylinder -l. However, any suitable pivotal support for the valve may be provided so long as the axis of movement lies in a cord the valve preferably offset a considerable distance from the horizontal diameter of The lower portion of the valve i-- is weighted in any suitable way as by means of weights permanently secured thereto or by thickening the valve as illustrated at 6 in. the original operation of manufacture. It will be apparent that the valve swings freely upon its axis and due to the greater surface area beneath said axis, the lower portion will be drawn inwardly by suction produced in the inner portion of the cylinder 1 to permit the passage of air go the carbureter. Should the motor back re, direction to permit the escape of the gases.

The intake pipe 3 in the usual manner has its end part 7-- fitted into the rear portion of the carbureter so that the pipe 7 extends rearwardly from the carbureter and the axis of the tubular pipe -3 is substantially parallel with the direction of movement of the vehicle and the axis about which the valve 4 moves is substantially perpendicular to the direction of movement of the vehicle so that when the vehicle moves up a steep grade, the valve by gravity tilts toward the position shown in dotted lines at 8- and considerable greater suction is required to open the valve than when the vehicle is moving upon the level, with the result that the proper amount of air is drawn into the carburetor when the valve opens to produce the most effective mixture for the engine under conditions of up hill driving. The reverse direction results when the vehicle is moving down hill. The device is exceedingly simple in construction and its operation is automatic in controlling the proper supply of air to the carbureter in accordance with the varied requirements of the engine.

Although I have shown and described a specific construction of device as illustrative of a perhaps preferred embodiment of my the valve readily opens in a reverse invention, I do not desire to limit myself to the details of construction, form and arrangement as various modifications may be made within the scope of the appended claims.

What I claim is 1, In an air-regulating device for carbureters, a tubular member of substantially circular cross section, and unobstructed throughout its length, a circular floating disk valve substantially filling the tube, and extending transversely of the same means for supporting the valve for free swinging movement in both directions from closed position about a substantially horizontal axis off-set from the horizontal diameter 0 the valve so that the surface area of the valve below said axis is greater than the surface area of the valve above said axis,

said valve being actuated solely by gravity,

and the suction producedin the carbureter.

2. A device of the class described comprising a tubular member of substantially circular cross section'and unobstructed throughout its length, a floating disk valve positioned within the same, means for supporting the valve across the tubular member for free swinging movement in both directions from closed position about a "substantially horizontalaxis off-set from the horizontal diameter of the tubular member so that the cross-sectional area of the tubular member below said axis is greater than "the cross-sectional area above said axis, the position of said valve being controlled solely iy thesuction produced in the carbureter and by gravity in accordance with the :position of the'device. i i i In witness whereof I have hereunto set my hand this 9th day of August, 1919.

EDWARD R. CASE.

' Witnesses:

E. A. THOMPSON, N. .Roor. 

